.componet-a {
  width: 100px;
  height: 30px;
  background-color: #F00;

  position: absolute;
  top: 50px;
  left: 20px;
  z-index: 999;

  .title {
    color: #f00;
  }
}

.cus-com {
  background-color: #00f;
}